When using a carbon dioxide
Fire Extinguisher, if it is used outdoors, you should choose to spray in the upwind direction, and place your hand on the wooden handle of the cylinder to prevent frostbite. If it is used in a small space indoors or outdoors, the operator should leave quickly after extinguishing the fire to prevent suffocation.
Cart-type dry powder fire extinguishers and portable dry powder fire extinguishers are suitable for fires and how to use them:
Sodium bicarbonate
Dry Powder Fire Extinguisher is suitable for initial fires of flammable and combustible liquids, gases and electrical equipment; ammonium phosphate dry powder fire extinguishers can not only be used for the above types of fires, but also can extinguish initial fires of solid materials. But none of them can put out metal burning fires.
When putting out a fire, you can quickly run to the fire scene with a handheld or shoulder-carrying fire extinguisher, and put down the fire extinguisher about 5 meters away from the burning place. If you are outdoors, you should choose to spray in the upwind direction. If the dry powder fire extinguisher used is an external pressure storage type, the operator should hold the spray gun firmly with one hand and lift the opening handle on the gas storage bottle with the other hand. If the gas storage bottle is opened by a hand wheel, turn it counterclockwise, rotate it to the highest position, and then lift the fire extinguisher. When the dry powder is sprayed out, quickly aim at the root of the flame and sweep. If the dry powder fire extinguisher used has a built-in gas storage bottle or a pressure storage type, the operator should first remove the safety pin on the opening handle, then hold the nozzle at the front end of the spray hose, and use the other hand to open the pressure handle Press down and open the fire extinguisher to put out the fire. When using a fire extinguisher with a spray hose or a pressure-storage fire extinguisher, the handle should always be depressed with one hand and cannot be released, otherwise the spray will be interrupted.
When using a dry powder fire extinguisher to extinguish flammable or flammable liquid fires, you should aim at the main part of the flame and spray. If the liquid fire being extinguished is flowing and burning, you should aim at the root of the flame from near to far, and spray from left to right until all the flames are extinguished. If a flammable liquid is burning in the container, users should aim at the root of the blaze and rock it to mow, so that the sprayed dry powder flow covers the entire container opening. When the blaze is driven out of the container, the user should continue to spray until the blaze is extinguished. . When extinguishing a flammable liquid fire in a container, care should be taken not to aim the nozzle directly at the liquid surface to prevent the impact of the jet from causing the flammable liquid to splash out and expand the fire, making it difficult to extinguish the fire. If a flammable liquid burns in a metal container for too long and the wall temperature of the container is higher than the self-ignition point of the flammable liquid, it will easily cause re-ignition after extinguishing the fire. If used in conjunction with a foam fire extinguisher, the fire will be extinguished. Better results.
When using an ammonium phosphate dry powder fire extinguisher to extinguish a solid combustible fire, the spray should be aimed at the most violent burning point and sweep up, down, left and right. If conditions permit, the user can hold the fire extinguisher and spray it while walking around the burning object, so that the dry powder fire extinguishing agent can be sprayed evenly on the surface of the burning object until the flame is completely extinguished.
Cart-type foam fire extinguisher adapts to fires and usage methods:
Its adaptability to fires is the same as that of portable chemical foam fire extinguishers.
Instructions for use: When used, it is usually operated by two people. First, quickly push and pull the fire extinguisher to the fire scene, and stop it 10 meters away from the fire point. After one person releases the spray hose, he holds the spray gun with both hands and aims at the burning area; the other First, turn the handwheel counterclockwise to raise the screw to the highest position to fully open the bottle cap. Then tilt the cylinder backward to make the pull rod touch the ground, and rotate the valve handle 90 degrees to spray foam to extinguish the fire. If the valve is installed at the spray gun, the person responsible for operating the spray gun should open the valve.
The fire extinguishing methods and precautions are basically the same as those of portable chemical foam fire extinguishers, so you can refer to them. Since this type of fire extinguisher has a long spray distance and a long continuous spray time, it can give full play to its advantages and be used to extinguish initial fires in large-area storage tanks or oil tankers.
When using a cart-type fire extinguisher, point the back of it toward the fire source (it should be placed in the upwind direction outdoors), first remove the spray gun, unfold the powder outlet pipe (remember not to twist it), and then lift the air inlet lever to allow carbon dioxide to enter Storage tank, when the gauge pressure rises to 0.7 MPa ~ 1 MPa, lower the air intake pressure rod to stop air intake. At this time, turn on the switch, spray dry powder, and put out the fire from near to far. For example, when fighting an oil fire, do not let the dry powder air flow directly hit the oil stain to avoid splashing the oil surface and spreading the fire.
